All-optical flip-flop device
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United States of America Patent
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Sep 24, 2002
Grant Date -
N/A
app pub date -
Jun 9, 2000
filing date -
Dec 10, 1999
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Abstract
A bistable optical device such as a semiconductor optical amplifier (SOA) emits an output beam at either a high level or a low level, depending on which of the two stable states the device occupies. The device is switched between the two stable states without a need for a change in the input holding power by changing the hysteresis of the device. The hysteresis is changed by the application of set and reset optical pulses which change the gain and therefore the refractive index of the device. The device has applications to optical communication and computing systems such as optical memory, wavelength conversion and pulse length conversion.
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